Question 1

Which one of the following reactions,cycles,or pathways is not found in plant systems?

Accepted Answer

A) The Calvin cycle 
B) The gluconeogenesis pathway 
C) The glyoxalate cycle 
D) The rubisco reaction 
E) The urea cycle 
A) The Calvin cycle 
B) The gluconeogenesis pathway 
C) The glyoxalate cycle 
D) The rubisco reaction 
E) The urea cycle

Question 2

Which of these enzymes is not part of the Calvin cycle?

Accepted Answer

A) Aldolase 
B) Glyceraldehyde 3-phosphate dehydrogenase 
C) Phosphofructokinase-1 
D) Ribulose-5-phosphate kinase 
E) Transketolase 
A) Aldolase 
B) Glyceraldehyde 3-phosphate dehydrogenase 
C) Phosphofructokinase-1 
D) Ribulose-5-phosphate kinase 
E) Transketolase

Question 3

The synthesis of glycogen,starch,and sucrose all:

Accepted Answer

A) involve addition of a sugar residue at the reducing end of the growing polymer. 
B) take place in liver and muscle of mammals. 
C) use a sugar nucleotide as substrate. 
D) use glucose 1-phosphate as the only substrate. 
E) use glucose-6-phosphate as substrate. 
A) involve addition of a sugar residue at the reducing end of the growing polymer. 
B) take place in liver and muscle of mammals. 
C) use a sugar nucleotide as substrate. 
D) use glucose 1-phosphate as the only substrate. 
E) use glucose-6-phosphate as substrate.

Question 4

Explain why both ATP and NADPH are required for the operation of the Calvin cycle,and why these two reactants are required in different amounts.

Accepted Answer

ATP is required in two reactions of the

Question 5

The known mechanisms of activation of rubisco or of other enzymes of the Calvin cycle during illumination include all of the following except:

Accepted Answer

A) increased stromal pH. 
B) light-driven entry of Mg2+ into the stroma. 
C) phosphorylation by cAMP-dependent protein kinase. 
D) phosphorylation of phosphoenolpyruvate carboxylase. 
E) reduction of a disulfide bridge by thioredoxin. 
A) increased stromal pH. 
B) light-driven entry of Mg2+ into the stroma. 
C) phosphorylation by cAMP-dependent protein kinase. 
D) phosphorylation of phosphoenolpyruvate carboxylase. 
E) reduction of a disulfide bridge by thioredoxin.

Question 6

All are true of photorespiration except:

Accepted Answer

A) It is driven by light. 
B) It oxidizes substrates to CO2. 
C) It produces O2. 
D) It results from a lack of specificity of the enzyme rubisco. 
E) It results in no fixation of carbon. 
A) It is driven by light. 
B) It oxidizes substrates to CO2. 
C) It produces O2. 
D) It results from a lack of specificity of the enzyme rubisco. 
E) It results in no fixation of carbon.

Question 7

In the carbon assimilation ("dark")reactions of photosynthesis,the biosynthesis of 1 mol of hexose from 6 mol of carbon dioxide requires:

Accepted Answer

A) 12 mol of NADPH and 12 mol of ATP. 
B) 12 mol of NADPH and 18 mol of ATP. 
C) 18 mol of NADPH and 12 mol of ATP. 
D) 18 mol of NADPH and 18 mol of ATP. 
E) no NADPH and 12 mol of ATP. 
A) 12 mol of NADPH and 12 mol of ATP. 
B) 12 mol of NADPH and 18 mol of ATP. 
C) 18 mol of NADPH and 12 mol of ATP. 
D) 18 mol of NADPH and 18 mol of ATP. 
E) no NADPH and 12 mol of ATP.

Which one of the following reactions,cycles,or pathways is not found in plant systems?

Which of these enzymes is not part of the Calvin cycle?

The synthesis of glycogen,starch,and sucrose all:

Explain why both ATP and NADPH are required for the operation of the Calvin cycle,and why these two reactants are required in different amounts.

The known mechanisms of activation of rubisco or of other enzymes of the Calvin cycle during illumination include all of the following except:

All are true of photorespiration except:

In the carbon assimilation ("dark")reactions of photosynthesis,the biosynthesis of 1 mol of hexose from 6 mol of carbon dioxide requires:

The Foundations of Biochemistry

Water

Amino Acids, peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

Recombinant Dna Technology

Lipids

Biological Membranes and Transport

Biosignaling

Principles of Bioenergetics

Glycolysis, gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Lipid Biosynthesis

Biosynthesis of Amino Acids, nucleotides, and Related Molecules

Integration and Hormonal Regulation of Mammalian Metabolism

Genes and Chromosomes

Dna Metabolism

Rna Metabolism

Protein Metabolism

Regulation of Gene Expression

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Exam 20: Carbohydrate Biosynthesis in Plants and Bacteria

Which one of the following reactions,cycles,or pathways is not found in plant systems?

Which of these enzymes is not part of the Calvin cycle?

The synthesis of glycogen,starch,and sucrose all:

Explain why both ATP and NADPH are required for the operation of the Calvin cycle,and why these two reactants are required in different amounts.

The known mechanisms of activation of rubisco or of other enzymes of the Calvin cycle during illumination include all of the following except:

All are true of photorespiration except:

In the carbon assimilation ("dark")reactions of photosynthesis,the biosynthesis of 1 mol of hexose from 6 mol of carbon dioxide requires:

The Foundations of Biochemistry

Water

Amino Acids, peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

Recombinant Dna Technology

Lipids

Biological Membranes and Transport

Biosignaling

Principles of Bioenergetics

Glycolysis, gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Lipid Biosynthesis

Biosynthesis of Amino Acids, nucleotides, and Related Molecules

Integration and Hormonal Regulation of Mammalian Metabolism

Genes and Chromosomes

Dna Metabolism

Rna Metabolism

Protein Metabolism

Regulation of Gene Expression

Filters